Bumper jack and method of applying the same



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A. C. QUARNSTRQM BUMPER JACK AND METHOD OF APPLYING THE SAME Filed Oct.

Aug. 26, 1952 ing: jacks and, more particularly,

'bile bumper jack and method of applying the device for thereason that four lifting jack abutments,

is applied,

Patented Aug. 26, 1952 UNITED STATE BUMPER JACK AND METHOD OF APPLYING THE SAME Andrew C. Quarnstrom, Minneapolis, Minn. Application October 3, 1941, Serial No. 777,762

1 Claim.

My invention relates to improvements inliftto an automosame.

. It is well known that to the average automobile operator, a bumper jack is a very awkward he does not know the best place to apply the same in relation to a bumper, with the result that. the jack, for the first trial at least, invariably slips and lets the wheel being lifted drop. Furthermore, the jack is often placed relative to a bumper in which it is necessary to lift the bumper higher than would benecessary if the jack were placed at the most advantageous point.

The principalobject of this invention is to permanently embody in the front and rear bumpers offan automobile, or their attaching structures, one for each wheel of the automobile. I j

Another object of this invention is to provide bumper abutments for a lifting jack that positively positions a lifting jack relative to a wheel to be lifted and. locks the jack relative to the bumper and thus prevents the jack from slipping or tipping relative to the bumper to" which it is applied.

A further object of this invention is to provide a bumper jack in which its operating lever and release are above the bumper to which the jack where they can be manipulated without having to stoop or work below the bumper.

Other objects of this invention will be apparent from the following description.

e To the above end, generally stated, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claim.

, In the accompanying drawing, which illustrates the'invention, like characters indicate like parts throughout the several views.

Referring to the drawing:

and partly in section taken on the lines 4-4, 5-5 and 6-43 of Fig. 2; and

Fig. 7 is a. fragmentary detail view taken on the irregular line 1-1 of Fig. 4.

The numeral 8 indicates in plan an automobile, as an entirety, with the exception ofits front and rear bumpers 9 attached thereto by brackets I0, each bracket including an outer arm I l.

Four abutments I2 for the application of a hydraulic jack I3 to either one thereof'are attached one to the arm II of each bum-perbracket II). There is'one of these abutments for each wheel of the automobile 8. While the abutments I2 are shown attached to the bumper bracket arms II, it will be understood that they may be attached directly to the bumpers 9 or any attaching structure therefor. These abutments [2 may be applied either at the time an automobilelfis manufactured or at any time thereafter.

Each abutment i2 is in the form of a horizontally disposed flat plate I4 having on its inner bracket arms II .Fig. l is a plan view of an automobile having thebumper jack abutments applied to the attaching brackets of the front and rear bumpers thereof;

1 Fig. 2 is an elevational view of the improved bumper jack applied to one of the abutments partly shown in section .and also showing in section the bumper bracket arm to which the abutment is attached;

Fig. 3 is a fragmentary view of the upper portion of the bumper jack as viewed from the left in Fig. 2;

Figs. 4, 5 and 6 are detail views partly in plan edge portion an integral depending clamping member I5. This clamping member I5 is provid ed with upper and lower pairs. of screw studs I6 that extend through holes in a clamping plate l1. Nuts I9 are applied to the screw studs I6 outwardly of the clamping plate I1. One of the extends between the clamping member I5 and the clamping plate I1, and the upper pair of screw studs I6 extends transversely over said arm and the lower pair of screw studs It extends transversely under the same. [By tightening the nuts IS on the screw studs I6, the clamping member I5 and the clamping plate I! will be tightly clamped onto the bracket arm H and thereby rig-idly secure the abutment I 2 to the bumper bracket ID.

A rubber block I9 is rigidly secured by vulcanization or otherwise, to the under side of the abutment plate I4 and the outer face of the depending clamping member I5. Formed in the abutment plate I4 and the rubber block I9 is a long upright passageway 20 for the jack Iii. Formed in the abutment plate I4 is a lug passageway 2| that extends radially into the passageway 20, and formed in the rubber block I9 at one side of the passageway 20 is circumferentially extended lug passageway 22 that forms, in part, an extension I .66 wardly of the lower end of the cylinder 25 and by. means. of the .the' jack Isis/lifted 'l itsfeylinderi2fi aligned with the passageway?!) ,guarter.,turnto move the ,a'ligmnent with'the poi 'thejjacksl3Qrelative tothe abutment l2;posiitions'the "abutment plate M betweentwo of the the lower end of the plunger 26 is rounded at 21.

A hand lever 23 is mounted on the reservoir case 24 for operating the jack to raise the same, and a hand wheel 29 is also mounted on said resv ervoir case for releasing the fluid and allowing the jack [3 to :be lowered by the weight of the load thereon.

For the DUIPQSBZOI this case; it is not thought necessary to show the interior connection "for operating the plunger 26 from the hand lever 28 as the same is well known.

Integral with the cylinder 25 is a column of elongated lugs 30 endwise spacedapart'to -leavegaps 3| therebetween.

A removable supporting base 32 is providedrfor the jack I3 and has a handle 33 by which it can be moved. This base 32 has in its-top-aconcave seat 34 for the rounded end 21 of the plunger26. 1

To lift one of thhe wheels of the automobile 8 Jack 13 interlocked with the abutment nearest'the wheel to be lifted, for the purpose .of changing-a tire, applying achain or "Tor any other reason,ithe base 321s placed on the ,groundunder the respective abutment l2. ..Next, above 'the abutment 12 with and the .lugs .30 aligned with the passageway'fl.

With thejack 13 thus positioned, itscylinder Z5 .-is'lo'wered through thepassageway. 29 until the .mundeden'd'iZ Tof 5.011 the seat 134'1'n the base '32. ling of the cylinder 25 in. the passageway I20, the ..I co1umn of lugs moves downwardly through the passagewayll.

:Next, ithehand lever28 is manipulated to ad- ,jjjju'st' the Jack 13 to bri e lignment withthe abutment plate M. The enthe plunger'25 enters andrests During the lowerg'the nearest gap v3i into "tire jack "I3jis neXt -iven substantially a onecolumn of lugs 30 out of passagewayiiifl. This'turning on the respective abutment 12.

I3 with which it is 'F'romithe above description, it is evident that theijacklBmay be very quickly and easily applied to any one of the abutments 12 and positively located thereby at the most advantageous position relative to the wheel to be lifted. The long passageway 29 in the abutment plate [4 and the rubber block 19 holds the jack l3 in an upright position and prevents tipping thereof relative to the abutment I 2.

The rubber block l9 at the ends of the passageway 22 afiords stops 35 and 36 that are en- =gaged :by certain of thelugs and limit the turning of the cylinder 25iinji the ;.passa'geway 20. When the stop is engaged by one or more of the lugs 30, the column of lugs 30 are aligned with thepassageway 2| and thus permits the jack :13 to-be lifted'from the respective abutment I2.

Engagement of one or more of the lugs 39 with :the stop '36 positions the cylinder 25 with the lug 30 next below the abutment plate I 4 in alignment with the-lock seat 23 so that said lug will enter the same when the jack [3 is operated to lift a wheel.

It .will be understood that theinvention de scribed is capable of various modificationswithin the scope of "the invention hereindisclosed-and claimed.

WhatIclaimis:. V g (The combination with one ofthefbumpers of an automobile provided with a'horizontally disposed lock plate having'a verticalcylinder passageway and a locking-passageway leading into the cylinderpassageway, of a hydraulic jackincluding an uprightcylinder and a supporting ,plunger extending into the cylinder 'at itslower lend, andmanually operated means on the upper .end of thecylinder for lifting. the cylinder relasaid cylinder having exterlock lugs, said cylindergand tive to the plunger, nal vertically spaced .itslock lugs being inserted through their passagewaysfromabove thelock plate, said cylinder Qbeingturnable about its axis to bring the lock "file of this patent:

lugs out of alignment with their passageway and position.one .ofthe lock lugs underthe lock plate.

ANDREW o. *QUARNSTROM.

REFERENCES CITED The following references are of record in the UNITED STATES .PA'IENTS ,Number Name .Date

1,784,116 Shev1in. .Dec. 9, 1930 1,828,913 .Toomey et al Oct..27,.l931 2,044,699 Johnson June .16, .1936 2,164,621 'Pfauser July 4, 1939 2,215,146 Compano; Sept. 17,1940 2,259,789 Akins 'Oct. 21,1941 2,369,545 Dunn. Feb. 13, 19.45 2,422,144 Stevens June.10, l9.47 

